I have tried to run this with both eclipse(CDT)+MinGW and Cygwin+GCC

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#include <stdio.h>
#include <stdlib.h>
#include <float.h>
 
int main()
  {
    puts("The range of ");
    printf("\tlong double is [%Le, %Le]∪[%Le, %Le]\n", -LDBL_MAX, -LDBL_MIN, LDBL_MIN, LDBL_MAX);
    return EXIT_SUCCESS;
  }

but got different results:

  • In eclipse(CDT)+MinGW
    The range of
    long double is [-1.#QNAN0e+000, 3.237810e-319]∪[6.953674e-310, 0.000000e+000]
  • In Cygwin+GCC
    The range of
    long double is [-1.189731e+4932, -3.362103e-4932]∪[3.362103e-4932, 1.189731e+4932]

This is weird, and I googled it, then just found this http://www.thescripts.com/forum/thread498535.html

The LDBL_MAX of long double is machine-dependent, but why it like this in same machine? I guess it’s the problem with MinGW. Anyone hv any idea?